I do not have any 1 BR STRs/MTRs but I have seen annual STR rents based on bedroom count in both my market (San Diego) and emerald coast (one of the markets I have made offers) and the difference in the income is substantial between 2 BR and 1 BR.  

The max you can offset for a LTR is 25k and this is phased out based on your level of income.

You know, I always think that is very misleading when they charge thousands of dollars to newcomers base off marketing that boasts getting into real estate with no money down.These deals cost money. 

The safest bet is to get yourself some oil based primer and a coat of paint on the interior when turning it over.

Based on my research, the vacancy rate at Fort Worth, TX was 9 %.

Don't wait too long, because those gain may lose value based on time, trends, or rates.

It also matters what budget tier you exist within a market - like the $ - $$$$ for restaurants, we intuitively understand the general experience and price point based on those dollar signs.

Many of the property managers talk to each other and compare notes and share marketing ideas and 'run comps' on each other.The other option would be the 'enemy method' to search for similar size home within your community and others close by with similar amenities and scour their calendars. 

I thought about 20 as well but I am not sure if that is realistic based on my other goals.

I am working full-time and expect to have a property management company handle the property, but want to set expectations for them based on what I've learned through my studies.